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Spare parts and maintenance of drilling equipment
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A one-stop solution provider for offshore drilling equipment
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Upgrade solutions for existing compensation systems

Trusted partner for drilling equipment

Maritime Drilling Systems (MDS) is a Norwegian, ISO 9001-certified and Magnet JQS-qualified service and maintenance company specializing in spare parts, inspections, overhaul, refurbishment, and technical upgrades of offshore drilling equipment worldwide.

We source exclusively Original Component Manufacturer (OCM) spare parts, ensuring full compliance, high reliability, and preservation of equipment integrity throughout its entire lifecycle.

To enhance customer transparency and operational insight, MDS offers a real-time digital service and maintenance portal. The platform provides full visibility into project and asset performance, including live project tracking, secure access to documentation, certification records, and complete service history — ensuring control, compliance, and full asset traceability at all times.

As a strong challenger to traditional OEMs, we deliver high-quality services combined with competitive pricing, offering our clients a flexible and cost-effective alternative.

MDS also provides experienced manpower services to support larger projects and operational demands. Our skilled personnel integrate seamlessly with customer teams, delivering reliable expertise, flexibility, and additional capacity when needed.

Our Quality Policy ensures compliance with international standards, continuous improvement of our services, and high customer satisfaction through consistent and dependable performance.

All our services are supported by a team of experts with more than 20 years of first-hand industry experience, ensuring competence, precision, and reliability in every project.

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Upgrade solutions for existing compensation systems

Maritime Drilling Systems are able to provide a range of upgrade and replacement options for existing compensating systems. Our solutions are reliable, fully tested and cost effective, providing the benefits of modern systems for a fraction of the price and with short installation times.

Contact us today to discuss your needs.

  • Isolation valves (overhaul and new)

  • Anti-recoil valves

  • AHC valve blocks

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Tension Cylinder
Overhaul

Our facility is equipped to perform overhaul of large cylinders (MRT, GLT, PLT etc.) We can deliver Chrome, HVF and laser welded Incornel® 625 coatings and our unique state-of-the-art honing bench is specially developed for honing cylinder housings and accumulators. We also have competent personnel available for disassembly and assembly offshore.

  • Welded overlay on rod using modified Inconel® 625 nickel-chromium alloy etc

  • Thermal spray coatings

  • Specialist in low friction seal packing boxes

  • Honing and refurbishing of accumulator shell
  • Function and pressure testing
  • Painting
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Servicing, Support
and Repair

Our team of fully qualified and experienced engineers are ready to provide first class servicing, support and repair of compensation and drilling systems both onshore and offshore.
  • 24/7- technical support

  • Fully qualified and experienced team always available

  • Certified to the latest standards

  • 20 years experience

  • Mechanical, hydraulic, electrical and software engineering

  • Control systems - design, building and commisioning of on and offshore installations

Comprehensive Range of Services

Maritime Drilling Systems provide a comprehensive range of services to the offshore drilling industry. We strive to provide the best possible solutions for our customers in everything we do. Read more about some of the services we offer here.
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On-site Repair
Specialist

Maritime Drilling Systems specialise in on-site main shaft repair of drilling machines. Our experienced engineers can provide the support needed to get your systems back in operation as quickly and smoothly as possible.

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Preservation Solutions for Drilling Equipment

We provide long term preservation solutions which ensure your drilling equipment stays fit for purpose during lay-up and make sure there is a low cost in getting the equipment up and running again when it goes back in to service.

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Re-classification
Services

We have dedicated personnel for planning and preparation for 5-yearly re-classification. From stand alone to entire rig, we support the SPS planning process and can follow up in all phases of the project (in association with NATG).

Contact us today to discuss your needs
Bring innovation
to your offshore operations
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Crane
Services

Offshore crane repair services. Repair of hydraulic motors, pumps, load blocks, headache balls etc. Winch repairs and reconditioning (Braden & Ingersoll Rand and EBI). Winch certification.

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Spare Parts and  Lifecycle Services

Supply of OCM-certified critical and non-critical spare parts, consumables and field service support. Repair, overhaul and maintenance of drilling equipment. Upgrade programs and life-cycle management solutions for compensation systems
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Certifications and compliance

Inspection, condition assessment, service, repair, final documentation and re-certification Technical reporting, scope definition and spare parts evaluation Continuous class arrangements supported by OEM-trained personnel Class-approved welding (DNV / ABS / Lloyd’s as applicable) Offshore tubing and piping fabrication and installation Hydraulic system flushing and pressure testing in accordance with applicable standards
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Training & Technology

Specialized technical training in compensation systems

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Equipment Supply and Engineering

Supply and integration of complete rig packages. Mechanical, hydraulic and electrical engineering services

Provision of experienced offshore and onshore technical personnel (short- and long-term assignments

Personnel Deployment for larger projects

Our personnel department have a pool of highly qualified and experienced engineers available for short or long term contract (SPS/Yardstay).

Our skilled personnel integrate seamlessly with customer teams, delivering reliable expertise, flexibility and capacity when additional resources are required.

Contact us today to discuss your requirements.

Contact us

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Maritime Drilling Systems

HEAD OFFICE
Skibåsen 42e
N-4636 Kristiansand S
Norway

+47 990 99 222
post@mds.as

Registered company in Norway:
NO 916 040 199 MVA

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    Our Team

    Arild Birkenes

    General Manager
    +47 468 55 618
    arild.birkenes@mds.as

    Håkon Birkenes

    Technical Director
    +47 90176392
    hakon.birkenes@mds.as

    Per-Stian Kristoffersen

    Supply Chain and Project Coordinator
    +47 465 29 240
    per-stian.kristoffersen@mds.as

    Erik Mjaasund

    Supply Chain Manager
    +47 97010548
    erik.mjaasund@mds.as

    Thomas Shaun Solli

    Supply Chain Consultant
    +47 46502775
    thomas.solli@mds.as

    Nils Eivind Ausland

    Technical Project Manager
    +47 954 59 052
    Nils.Eivind.Ausland@mds.as

    Our Clients

    TP-OTC (Turkish Petroleum Offshore Technology Center) is a subsidiary of Turkish Petroleum Corporation (TPAO), established to provide engineering and technology services for offshore oil and gas operations. The company focuses on enhancing operational safety and efficiency through its highly qualified workforce, aiming to conduct successful and uninterrupted drilling activities in Turkey’s maritime zones and beyond.
    Turkish Petroleum Offshore Technology Center
    Website link
    ADES is a Saudi-based international drilling services company specializing in offshore and onshore operations across the Middle East and North Africa. With a focus on safety, operational excellence, and cost efficiency, ADES provides tailored drilling solutions through its extensive fleet of jack-up and land rigs, serving major oil and gas operators in the region.
    Ades Group
    Website link
    Transocean Ltd. is a leading offshore drilling contractor specializing in ultra-deepwater and harsh-environment drilling services. Headquartered in Vernier, Switzerland, the company operates a versatile fleet of mobile offshore drilling units, including ultra-deepwater floaters and harsh-environment floaters.
    Transocean
    Website link
    Foresea is a Brazilian offshore drilling company specializing in deep and ultra-deepwater operations, offering intelligent drilling solutions with a fleet of advanced rigs. The company emphasizes innovation, safety, and sustainability, operating primarily in Brazil’s offshore oil and gas sector.
    Foresea
    Website link
    Well-Safe Solutions is a UK-based specialist in well decommissioning, offering fully integrated plug and abandonment services using its own dedicated fleet of repurposed rigs. The company focuses on safe, efficient, and environmentally responsible solutions while also supporting emerging energy transition initiatives like geothermal and carbon capture.
    Well-Safe Solutions
    Website link
    Helmerich & Payne, Inc. (H&P) is a leading global drilling contractor headquartered in Tulsa, Oklahoma. Established in 1920, the company provides advanced drilling solutions and services to the oil and gas industry worldwide.
    H&P inc.
    Website link

    Our Partners

    • Logi Trans - With decades of experience and offices across Scandinavia and Europe, Logi Trans Group delivers reliable, flexible logistics solutions by road, sea, and air. Their strong focus on compliance, safety, and customer service makes them a valuable partner for handling complex transport needs, both locally and globally.
    • Oilgear - Oilgear is a global manufacturer of high-performance hydraulic systems and components, known for durable, custom-engineered solutions. The company serves demanding industries like oil and gas, defense, and manufacturing with a focus on innovation and precision.
    • Danfoss Power Solutions - Danfoss is a Danish multinational engineering company founded in 1933, specializing in energy-efficient technologies that enhance machine productivity, reduce emissions, and enable electrification. Operating globally, Danfoss serves diverse sectors including heating and cooling, mobile hydraulics, and power electronics, with a strong commitment to sustainability and innovation.
    • Van Halteren Technoligies - Van Halteren Technologies is a Dutch engineering company specializing in advanced drive and control systems, simulation technologies, and visual recognition solutions for the marine, offshore, defense, and energy sectors. With decades of experience, the company delivers customized, high-quality systems designed for demanding environments, emphasizing innovation, reliability, and long-term performance.